A driver circuit includes an output transistor circuit that includes a first transistor of a first conductivity type and a second transistor of a second conductivity type disposed between a supply voltage source and a reference voltage source, and that outputs an output signal from a connection node between the first transistor and the second transistor, a first pre-buffer circuit that drives a gate of the first transistor in response to an input signal, and a second pre-buffer circuit that drives a gate of the second transistor in response to the input signal.